He is the leader of the La Push wolfpack . Before Sam became a werewolf, he dated a Quilleaute by the name of Leah Clearwater. However when he became a werewolf/shapeshifter, he went through an involuntary process known as 'imprinting' which determines a werewolf's soulmate. Whom did he imprint on ? Surely not Leah but let's try her second cousin Emily Young for one ! This infuriated Leah and she has been bitter ever since. Sam couldn't tell Leah about his transformation, that is until she and her brother Seth became wolves themselves. Although furious with his advances at first , Sam grew on Emily (because it was her destiny) and they became engaged between Twlight and New Moon. Whenever Sam sees Leah , he feels bad because he still loves her. To make things worse , when in wolf form they can read each other's minds and are forced to endure their soap opera of a life along with the other members of the pack. Can someone say akward ?
In the series he is described as having 'an older' human face and black fur in wolf form. During his youth, Sam's father Joshua left him and his mother to fend for themselves. This factor is probably reflected in Sam's maturity for his 21 years on the earth. As for a minor downside.he once got angry at Emily and accidentally scared the right side of her face and and arm. She obviously forgave him and it is a bother to him when people stare at her.
This character is portrayed by Chaske (say chess-kay) Spencer,a native american actor.